diff --git a/frontend/less/espo/custom.less b/frontend/less/espo/custom.less
index 4ef670f284..c15fba30e5 100644
--- a/frontend/less/espo/custom.less
+++ b/frontend/less/espo/custom.less
@@ -2712,10 +2712,34 @@ table.table td.cell .complex-text {
     left: auto;
 }
 
+h1 {
+    font-size: 32px;
+}
+
+h2 {
+    font-size: 26px;
+}
+
+h3 {
+    font-size: 22px;
+}
+
+h4 {
+    font-size: 18px;
+}
+
 h5 {
     font-weight: 600;
     margin-top: 9px;
     margin-bottom: 9px;
+    font-size: 15px;
+    color: @gray-soft;
+}
+
+h6 {
+    font-weight: 600;
+    color: @gray-soft;
+    font-size: 14px;
 }
 
 .post-container .internal-mode-switcher {